Tension device for winding and like machines



May 26, 1942. T BUSHY v 2,283,512

TENSION DEVICE FOR WINDING AND LIKE MACHINES Filed Sep. 4, 1940 5 Sheets-Sheet ll May 26, w1942. T. N.- BUSHEY 2,283,912

TENSION DEVICE FOR WINDING AND`LIKE MACHINES Filed Sept. 4, 194G 3 Sheets-Sheet 2 f5 /Z 242 f4 May 26, 1942. T, N 'BL-JSHEY 2,283,912

TENSIONDEVICE FOR WINDING AND'LIKE MACHINES Filed Sept. 4, 1940 f3 Sheets-Sheet 3 Zazielzjc )gjw/ M www Patenied May 26,1942' f a 2,283,912 UNrrsDA STATES PATENT optic-Ei.

f t v vr mission nnvrolnirtlgmmo ANDInkE Y n) Universal Winding Company, Boston, Mass., a corporation of Massachusetts Application september 4, 1940, serial No. 355,379V A 1o claims.

The present invention relates to improvements in devices for tensioning strand materials such as yarn, thread or the like during their de livery to winding machines or in other transfer processes.

In the following specification and claims the term yarn is employed in a general sense to apply to all lm'nds of strand materials, either textile or otherwise, and the designation package is intended to indicate the product ofthe winding machine whatever its form.

One of the objects of the Vpresent invention is to provide a differential tension-device adapted to operate automatically to regulate the tension on the yarn during the Winding or otheroperation.

Another object of the invention is to provide a slidable wire for operating the relatively movable tension members of a tension-device during a winding operation in certain proportion tothe growth in circumference of the packagerbeing wound.

Another object of the invention is to provide a tension-operating means of the type indicated which is adjustable to vary therange of applied tension during the winding of a package.

Still another object of the invention is to provide tension-operating means of the type indicated which is of simple construction, eicient in operation and adapted for use over long periods of time without requiring repair or replacement of parts. A 3

Further objects of theimprovemen't are set forth in the following specification which describes one preferred embodiment of the'inven- Fig. 2 is an enlarged part-sectionalsde elevation of the tension-device and controlling,

line 6 6 of Fig. vshowingthe pivotal mounting for the cam-plate on the traverse-frame;

Fig.A '7 is a greatly enlarged transverse sectional `View takenV on line "l-l of Fig. 3 showing; the

means for connecting the .plunger to `the end vo f the slidable wire; and

Fig. 8 is a vertical sectional View .of the tension-device shown with avmodiied formof pressure means from that illustrated in F'ig. 4.

The present invention is concerned particularly with tension-devices for winding machines in which the winding spindle is rotated at a convstant rate of speed so that during the winding Vof a package thereon the rate of linear travel of the yarn progressively vincreases with the increase in circumference of the wound mass. It

- is well-known to those skilled'in the art that in means therefor, showing the position assumed winding on machines of this type as the winding progresses and the package increases inY circumference the yarn must feed thereto at a progressively accelerated rate; that is, with an increasing linear speed, and, therefore, unless 'controlled, the tension on the running yarn will be augmented from this cause; VIt has heretofore been proposed to provide means including pivoted elements for gradually relievingorreducing the applied tension on the yarn, during the growth of the package. In such prior art devices, due to the'pivotal mounting of the parts, the motion transmitted'from'the traverse-frame to control the tension-)device varies during the growth of the Winding package as a component of a sine wave due to the angularity of the .mov-

mgparts'.

The present invention isLdistinguishedl from such known devices by providing novel means for transmitting motion from acam or thelik'e on the traverse-frame of the winding machine directly to the tension-device whereby to produce a straight line variation in the tension applied to i the yarn during the growth of the package. 'The 'present improved tension controlling means comprises, in general, a. slidable wire and guide therefor for`directing its movement in a prede- Y termined path whereby movement at one end of the wire is transmitted without variation to the opposite end of the wire. The `end of the Wire is engaged by an adjustable cam-plate or the equivalent carried by the movable traverse-frame of the winding machine while the .opposite end of the wire may act against a slidable plunger 'of the tension-device forrelieving the pressure applied to the tension-members and hence acting to reduce the tension applied to the yarn; The traverse-frame and cam thereon move in direct proportion to the growth of the winding and Ythrough the inclined face of the cam themotion of the traverse-frame is transmitted through the slidable wire to reduce. the pressure on the movable element of the tension-device-in direct pro- Fig. 1 of the drawings illustrates a well-known type of winding machine comprising a. main frame 2 having upper bearings` for a rotary winding spindle 3 and lower bearings for a camshaft 4. Cylindrical or conical packages may be- Wound on the spindle 3 by traversing the yarn longitudinally thereof through the means of a reciprocating thread-guide 5 which is supported on a swinging traverse-frame 6. The thread-guide 5 is connected to a traverse-rod 'I slidable in grooved bearings in the traverse-frame 6 and arranged to be reciprocated by a helical cam, not herein shown, which'is rotated Vby the cam-shaft 4. The traverse-frame 6 yis pivoted on the camshaft 4 to adapt the thread-guide 5 carried thereby to move outwardly away from the Winding spindle 3 as the package is built up thereon. To counterbalance the traverse-frame 6 and maintain the thread-guide 5 bearing against the package during the progress of the winding the traverse-frame is preferably provided with a weighted arm 8 depending therefrom in the manner of a pendulum.

`modined construction the pressure elements are in the form of diaphragms constructed from suitable resilient material such as rubber, fiber or the like. As stated with respect to the springs 24 the diaphragrns have axial holes for slidably mounting them on the spindle I 5 with their sides bearing against the rims of the tension-disks I3 and I4 as illustrated in Fig. 8.

In either case the springs 24, or diaphragms 25,are forced toward each other under pressure applied thereto to urge the tension-disks I3 and I4 toward each other to apply resistance to the t passage of the yarn as it feeds therebetween. As

The tension-device I2 may comprise a pair of y opposed members of any suitable construction such as relatively pivoted elements, slidable members or elements of any known form adapted to bear against the running yarn strand. As herein illustrated the tension-device I2 is of the type shown and described in detail in the copending application for United States Letters Patent of Harold W. Hitchcock, Serial No. 224,386 filed August 11, 1938, now Patent No. 2253.521. The tension-device I2 may comprise a pair of concavo-convex disks I3 and I4 rotatably mounted on a plunger-rod or spindle I5 slidable in the bore of a sleeve I6. The sleeve I6 has a knurled head I1 and its main portion is vexternally threaded to engage the internally threaded bore of a hub or boss I3 formed integral with a tension bracket I9 fastened to the side of the frame 2. The sleeve I6 may be adjusted longitudinally in the boss I8 and is held in adjusted position by a knurled lock-nut 20 screwed onto the sleeve and set up against the side of the boss. The tension-disks I3 and I4 may be of saucer-shape, being preferably constructed of sheet-metal with their opposed portions having fiat faces adapted to bear against the strand s drawing therebetween.

The means for applying pressure to the disks I3 and I4 to force them toward each other to adapt them to bear against the strand s may consist of a flexible spiderlike spring 24 for each disk, preferably constructed from suitable resilient material such as phosphor-bronze, springsteel or the like. The springs 24 have a plurality of radial arms as shown in Fig. 4 to adapt them tovbear against the rims of the tensiondisks I3 and I4. The springs 24 are formed with axial holes for supporting them on the central spindle I5 and pressure is applied to the springs adjacent their centers to cause them to yieldingvly press against the outer rims of the disks I3 and I4.

'I'he tension-device illustrated in Fig. 8 diiers from that described above only in the form of 'the' pressure means employed therewith. In this 75 herein shown, the pressure means comprises the spindle or plunger-rod I5 on which the tensiondisks I3 and I4 are mounted and which is slidable in the sleeve I6. The inner spring 24 has its central portion held in abutting relation to the'end of the sleeve I6, while the central portion of the outer spring24 is engaged by a washer or abutment 26 secured to the outer extremity of the plunger-rod or spindle I5 by means of a set-screw 2'I. It will thus be observed that when the plunger-rod or spindle I5 is slid to the left as viewed in Fig. 2 the abutment 26 will bear against the central portion of the outer diaphragm 24 to cause pressure on both springs, whereof to adapt them to yieldingly press against the rims of the two disks I3 and I4. As the pressure of the abutment 26 is increased the springs will be flexed to cause them to be bowed inwardly toward each other to a slight extent. With the form of tension-device shown in Fig. 8 the diaphragme 25 are flexed in the same manner to cause them to be bowed inwardly toward each other.

The plunger-rod or spindle I5 normally applies a predetermined amount of pressure on the springs 24 by means of a spring 28 surrounding `the spindle and acting between the knurled head II of the sleeve I6 and acollar 29 attached to the spindle by means of a set-screw 30. Thus, the springs 24 are normally flexed as illustrated in Fig. 2 to apply a predetermined amount of pressure against the tension-disks I3 and I4 to cause them to apply resistance to the draft of the yarn.

In accordance with the present invention the pressure applied to the springs 24 by the plungerrod or spindle I5 is gradually reduced in direct proportion to the increase in the linear speed of the yarn due to the growth of the winding on the package being wound. The means for controlling the pressure applied to the springs 24 comprises a cam-plate 32 on the side of the counterweight 8 of the transverse-frame 6 and a Wire 33 slidable in a tubular guide 34. As illustrated in Figs. 1 and 5 the cam-plate 32 is inclined with respect to the plane of movement of the traverseframe counterweight 8 and arranged with its outer fiat face engaged by one end of the slidable wire 33. Preferably, the cam-plate 32 is made of sheet-metal with lateral ears 35 bent at right-angles thereto intermediate its ends. The ears 35 are received between the opposite arms 36 of a U-shaped bracket 3'I attachedto the side of. the counterweight 8 by means of screws 36, see Fig. 6. The cam-plate 32 is pivotally mounted on the'counterweight 8 by means of a pin 39 extending through the ears 35 of the plate and the armsv 36 of the U-shaped bracket 3l to adapt the cam-plate for rocking movement to adjust its inclination to the plane of movement of the traverse-frame counterweight 8.

The cam-plate 32 may be adjusted in angular accesi-.c

relation to the plane of movement of the traverse-frame counterweight 8 by means of a screw 40 having an annular groove 4I into which one end of the cam-plate projects, see Fig. 5. The screw 40 has its threaded portion 42 screwed into a tapped hole 43 in the counterweight 8 and is provided with a knurled head 44 at its opposite end. By turning the stud 40 the end of the camplate 32 projecting into the annular groove 4I is moved toward or away from the counterweight to cause the cam-plate to rock on the pivot pin 3S. The cam-plate 32 is held in any adjusted position by means of a lock-nut 45 on the threaded portion 42 of the stud 40 which may be set up in binding engagement lwith the side of the traverse-frame counterweight 8.A

The slidable wire 33 and tubular guide 34 therefor are mounted on a suitable bracket 48 extending from the bracket I9 supporting the tension-device I2. As illustrated in Figs. 3

`and 5, the free end of the bracketV 48 overlies the side of the cam-plate 32 and terminates in a split hub 49. The guide 34 which is in the form of la flexible sheath or tube has one end joined to a rigid tube 59 extending through the split hub 49 of the bracket 48 and xedly clamped in position therein by lmeans of a binder screw I. The opposite end of the guide 34 is attached to one arm 52 of a U-shaped bracket 53 mounted on the bracket 48 by means of screws 54. As illustrated in Fig. 3, the guide has a nipple 55 secured to its 'end and screwed into a tapped hole in the arm 52 of the U-shaped bracket 53.

The slidable wire 33 extends through the guide or sheath 34 to conne its movement to a predetermined path and prevent lateral displacement thereof. In other words, due to the relatively close fit of the wire 33 in the sheath 34 movement of the wire is limited to :a predetermined path to transmit movement from one end to the other without lost motion. The end of the wire 33 adjacent the cam-plate 32 is joined to a plunger 51 which is slidably mounted in the tube 50 clamped in the hub 49 of the bracket 48. The plunger 51 is provided with a head or follower 58 having a curved end which bears against the inclined face of the cam-plate 32. The opposite end of the wire 33 is connected to a plunger 60 which is slidable in a bearing in the opposite arm 6I of the U-shaped bracket 53. As illustrated in Figs. 3 and 7, the plunger 60 is split at its rearward end to receive the end of the wire 33 and the latter is clamped therein by means of a collar 62 surrounding the split end and having a set-screw 63V for compressing the sides of the.

split against thewire.

The arrangement of the guide or sheath 34 and the wire 33 is such that the head or follower 58 of the plunger 51 at the end of the wire bears against the inclined face of the cam-plate 32 and the plunger 60 at the opposite end of the wire bears against the end of thev slidable spindle I5 of the tension-device. As the traverseframe 6 rocks on the cam-shaft 4 due to the growth in the winding the cam-plate 32 moves to the left, -as viewed in Figs. 2 and 5, thereby forcing the plunger 51 into the tube 5I).l Due to the construction of the wire 33 and guide 34 there is no lost motion so that the extent of movement of the follower 58 and of the plunger 69 at opposite ends of the wire are the same. The ends of the plunger 60 bearingagainst the end ofthe spindle I5 of the tension-device I2 causes the spindle to gradually move to the right from the position shown in Fig. 2 to that shown in Fig. 3 against the action of the spring 28 to gradually relieve the pressure applied to springs 24. Due to the direct transmission of the move- Vment Aof the traverse-frame to the spindle I5 of the tension-device I2 the tension applied to the yarn by the tension-members I3 and I4 is gradually reduced in direct proportion to the growth of the winding instead of with a'variable reduction as in the prior art devices incorporating Apivoted elementslAA preferred construction of the invention having now been described in detail the mode of operation of the device is as next explained.

To prepare the machine for winding the strand s of yarn or the like is drawn upwardly through suitable guides above and below 'the tensiondevice I2, threaded between the tension-members I3 and I4 and thence led across a rest 65 of the machine. The strand is then passed through the eye of the thread-guide 5 and its end attached to the tube t or other yarn-receiver mounted on the spindle 3; the traverse-frame 6 being then moved into position to place the thread-guide 5 against the cop tube t. The spring 28, acting against the collar 29 tends to move the spindle I5 of the tension-device' I2 to the left, as viewed in Fig. 2, until its end engages the end of the plunger 6I) at the end of the wire 33. The tension on the strand s is initially regulated by ladjusting the sleeve I6 longitudinally of the hub I8 to cause its end bearing against the inner spiderlike spring 24 to move toward or away from the collar or abutment 26 engaging the outer spiderlike spring, 24. The distance between the end of the sleeve. I6 and the abutment 26 determines the exure of the springs 24 or diaphragms 25, as the case may be, and thereby the amount of pressure they apply against the rims of the tension-members I3 and I4. The'initial tension applied to the strand s at the start of the winding is thus regulated in accordance with requirements. Y

The tension controlling device is further adjusted to regulate the extent of sliding movement imparted to the spindle I5 of the tension-device I2 by the traverse-frame 6 during the winding of a package and thereby the extent to which the applied tension is relieved. This adjustment is made by varying the angular inclination of the cam-plate 32 with'respect to the plane of movement of the counterweight 8. To this end the lock-nut 45 is loosened and the stud 40 turned to screw its threaded portion 42 into or out of the counterweight B whereby the cam-plate 32 may be 'tilted on the pin 39 to any desired angular relationship. To adapt the head 58 of the plunger 51 at the end of the slidable wire 33 to engage the face of the cam-plate 32 in accordance with the adjustment of the tensiondevice I2, the tube 50 is adjusted longitudinally in the split hub 49 of the bracket extension 48 and clamped in adjusted position by means of the screw 5I. With the tension-device and camplate 32 adjusted in accordance with requirements, movement of the counterweight from the position shown in full lines to that shown in dash lines in Fig. 5 during a winding operation will cause the wire 33 to slide through the guidesheath 34 to slide the spindle I5 toward the right from the position shown in Fig. 2 to that shown in Fig. 3 to gradually relieve the pressure of the springs 24 against the rims of the tension-disks I3 and I4. i

By the above explained method of operation of the tension controlling device the pressure of the two springs 24 against the tension-disks I3 and I4 is relieved so that the pressure of the disks on the strand s drawing therebetween is correspondingly diminished. It will be understood that this relief of the pressure on the springs 24 and the corresponding reduction in the pressure of the tension-disks on the strand is effected in certain proportion to the growth in the winding or, in other words, in certain proportion to the increase in linear speed or rate o f draft of the strand as the package grows in size. Due to the fact that the slidable wire 33 provides a direct connection between the cam-plate 32 and plunger I5 for the tension-device I2 and that the sheath 34 controls the movement of the Wire in a predetermined path, there is no variation in the movement transmitted from the traverse-frame 6 to the tension-device I2. In fine, as the speed of the draft increases due to the growing diameter of the package being wound the applied tension on the yarn is gradually reduced so that the tension at the point where the yarn delivers to the package may be maintained substantially constant or reduced somewhat throughout the winding,

For purposes of illustration the plunger l at the end of the slidable wire 33 is shown engaging the cam 32 at one side of its pivotal axis at the start of the winding, but it will be understood that in actual practice the plunger will be positioned directly over the pivotal axis of the cam whereby its position of initial adjustment will remain the same regardless of the inclination of the cam. This latter position of alinement of the plunger with the pivotal axis of the cam provides that a plurality of the tensionrdevices, for example, in a multiple spindle machine, or on several gangs, may be adjusted initially to give a uniform control of the tension for all the spindles. The axis of the cam may be considered the Zero point and by adjusting all the cams to the same degree of inclination while the plunger is at zero, uniformity of control is secured for all spindles. Uniform micrometer adjustment of the cams may be attained by turning their adjusting screws through the same part of a rotation and the degree of rotation of the screws may be shown by a Vsuitable index and pointer as is common with adjusting screws.

Although the cam 32 is shown as having a fiat face for transmitting a straight line motion to the tension-device I2, it will be understood that the face of the cam may have other contours for special conditions within the scope of the present invention. It will also be understood that the arrangement of the ,parts may be such as to produce a gradual decrease in the tension on the yarn at the winding point from start to finish of the package when desired.

It has been explained that the spring 28 acting between the end of the sleeve I6 and the col lar 29 on the plunger I5 of the tension-device I2 maintains the tension-disks I3 and I4 in cooperative relationship with the springs 24 or diaphragm 25, as the case may be, flexed to the required degree. It is sometimes desirable to open the tension-device; that is, by separating the disks I3 and I4 so that their yarn engaging surfaces may be inspected and cleaned of lint, specks or the like; or to clear the device of any loose yarn that may become entangled around the spindle I5. When it is so desired to separate the tension-disks I3 and I4 the operator merely grasps the outer disk I4 or the abutment 26 on the spindle I5 and draws the latter outwardly,

or to the right. During the longitudinal movement of the spindle I3 the collar 29 will act to compress the spring 28 between it and the knurled head I1 on the sleeve I6. With the disks I3 and I4 separated their yarn engaging surfaces and the spindle I5 may be readily cleaned, after which the spindle is released and permitted. to return to initial position under the action of the spring 28 to engage its end with the end of the plunger 60 at the end of the slidable wire 33. It is to be noted particularly that the separation of the tension-disks I3 and I4 in the manner as explained abovewill not disturb the adjustment of the tension controlling elements.

It will be observed from the foregoing description that the present invention provides a particularly simple yet ingenious means for positively and accurately controlling the pressure on the tension-members during the winding of a package whereby to relieve the tension applied to the yarn as the linear speed of the latter increases. In this way the device operates automatically to regulate the tension on the yarn without unwarranted variations resulting from the angular movement of the usual pivoted elements. It will also be observed that the present improved tension controlling device may be easily and accurately adjusted to vary the range of movement of the pressure-applying spindle of the tensiondevice to relieve the applied tension to any degree during winding or like operations in accordance with requirements. In addition to this facility of adjustment, the invention also provides for uniform -adjustment and operation of a plurality of tension-devices in multiple spindle machines. Y

While the invention is herein shown and described as embodied in a preferred form of construction it will be understood that modications may be made in the structure and arrangement of the parts of the device and in applying it to vuse without departing from the spirit or scope of the invention. Therefore, without limiting myself in this respect, I claim:

1. Ina winding machine, a winding spindle, means for traversing yarn longitudinally of the spindle, tension-means adapted to act against the yarn to resist its draft, means for applying pressure to said tension-means, a member movable by and with the growth in diameter of the winding, a flexible element connected to be moved by said Vmember to transmit motion directly therefrom to the pressure means to regulate the action of the latter, and means for guiding said element throughout its length to cause it to move longitudinally in a predetermined path whereby to act on the pressure means to gradually vary the tension on the yarn throughout the winding of a package.

v2. In a winding machine, a winding spindle, means for traversing yarn longitudinally of the spindle, a tension-device comprising a member adapted to bear against the yarn to apply resistance to its draft, means for applying a predetermined initial pressure lto said member, means movable during the growth lin diameter of the winding, and a flexible element slidable longitudinally by said last-named means to transmit motion to the pressure means to counteract its pressurewhereby to gradually relieve the pressure of the tension-member against the yarn throughout the winding of a package.

3. In a winding machine, va, winding spindle, means for traversing yarn longitudinally ofthe 'spindleto wind a package, 'a tension-device comprising a member adapted to bear against the yarn to apply resistance to its draft, means for applying pressure to said tension member, means movable by and with the growth in diameter of the winding package, a fiexible wire connected to the pressure means at its end, means actuated by said movable member to slide the wire longitudinally, and a guide extending throughout substantially the length of the wire for confining the sliding movement of the latter Ato cause the motion transmitted thereto to actagainst the pressure means to relieve the pressure of the tension-member against the strand throughout the winding of a package.

4. In a winding machine, a rotary winding spindle, ya thread-guide for traversing yarn longitudinally of the spindle, said spindle and thread-guide being relatively separable during the growth in the winding, a tension-device havinga member adapted to act against the yarn` being Wound to resist its draft, said tension-device being operable to vary the tension applied to the yarn, a flexible element slidable longitudinally for directly transmitting motion from the relative separation' of the spindle and threadguide to the tension-device to operate the latter to vary the resistance to the draft of the yarn during a winding operation, and means to guide the flexible element to cause it to slide in a predetermined path.

5. In a winding machine, a rotary windingA spindle,a traversing thread-guide, said spindle and thread-guide being arranged to separate during the growth in the winding, a tension-device having opposed members adapted to press against the yarn, said tension-device being operable to `"vary the pressure of the opposed members on the yarn, and means comprising a flexible wire,

a guide extending throughout the length of the wire to adapt the latter to slide longitudinally in a predetermined path, and means operated by the separation of the spindle and thread-guide to transmit motion through the wire to the tension- `device to decrease the pressure of the opposed members in proportion to the growth in the winding.

6. In a winding machine, a rotary winding spindle, a traversing thread-guide, a traverseframe for supporting the thread-guide to adapt it to move away from the spindle during the growth in the winding, said traverse-frame having a cam mounted thereon, a tension-device having a member adapted to press against the yarn, means for applying pressure to said tension-member, a slidable wire having one end engaging the cam on the traverse-frame and its opposite end opposing the pressure means to vary the pressure applied to the tension-member, and a guide for directing the movement of the slidable wire whereby movement of the traverseframe is transmitted through the wire to control the pressure means for the tension-device.

7. In a winding machine, a rotary winding spindle, a traversing thread-guide, a traverseframe for supporting the thread-guide to adapt it vto move away from the spindle during the growth in the winding, said traverse-frame having a cam mounted thereon, a tension-device having opposed members adapted to press against the yarn, means for applying pressure to the tension-members, a slidable wire havingy one end engaging the cam on the traverse-frame and its opposite end arranged to oppose the pressure means to vary the pressure applied to the tension-member, and a sheath enclosing the slidable wire to confine its movement to a predetermined path whereby movement of the traverseframe away from the spindle is transmitted through the wire to control the pressure means for the tension-device.

8. In a winding machine, a rotary Winding spindle, a traversing thread-guide, a traverseframe for supporting the guide to adapt it to move away from the spindle during the growth in the winding, a cam-plate mounted on the traverse-frame, means for adjusting the inclination of the cam-plate, a tension-device having opposed members adapted to press against the yarn, means to apply pressure to the opposed members of the tension-device, a slidable wirel having one end engageable with the cam-plate on the traverse-frame and its opposite end arranged to oppose the pressure-means to vary the pressure applied to the tension-members, and a guide for confining the movement of the slid- `able wire to a predetermined path whereby the movement of the traverse-frame is transmitted through the wire to the pressure-means for the tension-device to relieve the pressure in accordance with the adjustment of the camplate.

9. In a winding machine, la rotary winding spindle, a traversing thread-guide, a traverseframe for supporting the guide 'to adapt it to move away from the spindle during the growth in the winding, a cam-plate pivotally mounted on the traverse-frame, `an'adjustable stud engag- Y ing the cam-plate to adapt it to vary the inclination thereof, a tension-device having opposed members adapted to press against the yarn, means for controlling the tension-device to vary the pressure of the opposed members on theyarn, a slidable wire having one end engageable with the cam-plate on the traverse-frame and its opposite end engageable with. the controlling means, and a guide for confining the movement of the slidable wire to a predetermined path whereby to transmit the motion of the traverse-frame to the tension-controlling means.

10. In a winding machine, a rotary winding spindle, a traversing thread-guide, a traverseframe for supporting the thread-guide tov adapt it to move away from the spindle during the growth in the winding, said traverse-frame having a cam thereon, a tension-device having a pair of opposed disks rotatably mounted on a slidable spindle, resilient means acting against the tension-disks to cause them to press against a strand drawing therebetween, an abutment on the spindle for maintaining the resilient means under compression, a second resilient means aeting on the spindle to maintain the abutment on the spindle in engagement with the resilient means acting against the tension-disks, a slidable wire having one end engageable with the cam on the traverse-frame and its opposite end connected to the slidable spindle, and a guide for confining the movement of the slidable wire to a predetermined path whereby the movement of the traverse-frame is transmitted to the slidable Spindle to gradually release the tension applied to the yarn.

THOMAS N. BUSI-IEY. 

